4.3 Análisis del Entorno
4.3.1 Análisis de las Cinco Fuerzas Competitivas de (Porter, 1980)
PGP Virtual Disk is unlocked and locked by mounting and unmounting it from your computer. Symantec Encryption Desktop helps manage this operation for you. Although you specify a size for your PGP Virtual Disk, you can also create a
dynamically-sizing disk, one that grows larger as needs require it. The size you specify when you are creating the disk is the maximum size the disk can become.
When a PGP Virtual Disk is mounted, you can:
Move/copy files into or out of the mounted PGP Virtual Disk.
Save files to the mounted PGP Virtual Disk.
Install applications within the mounted PGP Virtual Disk.
Files and applications on a PGP Virtual Disk are stored encrypted. If your computer crashes while a PGP Virtual Disk is unmounted, the contents remain safely encrypted. When a PGP Virtual Disk is unmounted, it does not appear within Windows Explorer or the Mac OS X Finder, and it is inaccessible to anyone without proper authentication. It is important to remember that all your data remains secure in the encrypted file and is only deciphered when you access one of the files. Having the data for a volume stored in this manner makes it easy to manipulate and exchange PGP Virtual Disk with others but it also makes it easier to lose data if the file is somehow deleted. It is wise to keep a back up copy of these encrypted files so that the data can be recovered if something happens to the original.
For information about the PGP Options that affect PGP Virtual Disk volumes, see Disk Options (see "Disk Preferences" on page 169).
Caution: If you are using Symantec Encryption Desktop in a Symantec Encryption Server-managed environment, you may be required to create a PGP Virtual Disk after installing Symantec Encryption Desktop. If so, the size, file system, and algorithm may have been specified. For more information, see Using Symantec Encryption Desktop with Symantec Encryption Server (on page 179).
Creating a New PGP Virtual Disk
To create a new PGP Virtual Disk
1 Open Symantec Encryption Desktop and select the PGP Disk item. The PGP Disk window is displayed.
Note: If you did not install Symantec Drive Encryption (an option available if you selected Customize during the installation of Symantec Encryption Desktop) with an appropriate license, the only section displayed in this window is New Virtual Disk.
2 Click New PGP Virtual Disk. The New PGP Disk screen is displayed.
3 In the Enter your desired PGP Disk size field, type the amount of space that you want to reserve for the new PGP Virtual Disk. Use whole numbers, with no decimal places. You can also use the arrows to increase or decrease the number displayed in the field. Choose KB (Kilobytes), MB (Megabytes), or GB (Gigabytes) from the menu.
Using PGP Virtual Disk Creating a New PGP Virtual Disk
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4 Specify the type of authentication you want to use for the primary user of this PGP Virtual Disk:
To protect your PGP Virtual Disk with your keypair, select Public Key.
To protect your PGP Virtual Disk with a passphrase, select Passphrase.
5 To view or change the advanced options settings, select the Advanced Options checkbox. The Automatically resize PGP Virtual Disk as necessary checkbox is displayed, as well as the Cipher and Format menus.
Caution: The default Advanced Options settings are appropriate for most users. Avoid changing these settings if you are unfamiliar with them.
Select the Automatically resize PGP Virtual Disk as necessary checkbox if you want Symantec Encryption Desktop to manage the size of the new PGP Virtual Disk automatically. As you add or delete files, the disk size changes appropriately.
Caution: You can select (or not select) the Automatically resize PGP Virtual Disk as necessary option only when you are creating a PGP Virtual Disk. Once the disk is created, you can neither change a PGP Virtual Disk from a fixed disk to a resizable one, or vice-versa.
From the Cipher menu, select the encryption algorithm that you would like to use to protect your PGP Virtual Disk: AES-256 (256 bits), CAST5 (128- bits), or EME2-AES (256 bits). For more information about these encryption algorithms, see The PGP Virtual Disk Encryption Algorithms.
From the Format menu, select the disk format that you would like to use with your PGP Virtual Disk:
MS-DOS. Use if you intend to share this PGP Virtual Disk with someone using Symantec Encryption Desktop 10.3 for Windows.
Mac OS Extended. The default format (also the modern Mac OS file-system format); supports large PGP Virtual Disk volumes. The minimum size is 4 MB. The Mac OS Extended format is also called HFS+.
Mac OS Extended (Journaled). Use if Journaling is enabled on your system. (Journaling causes a copy of everything written to disk to be written a second time in a private area of the file system, making disk recovery easier if necessary.)
Mac OS Extended (Case-sensitive, Journaled). Use if case-sensitive Journaling is enabled on your system.
Mac OS Standard. For backwards compatibility with older Mac OS operating systems. The minimum size is 512 KB.
UNIX File System. Use if you intend to share this PGP Virtual Disk volume with someone using a UNIX file system. The minimum size is 128 KB. You can see format of an existing Mac OS X drive by selecting the drive, then selecting Get Info from the File menu.
6 Click Continue.
7 The next step depends on whether you chose public key or passphrase authentication.
For public key access, the Select a Public Key to Secure Your PGP Disk screen is displayed, displaying the public keys you can use for authenticating to the PGP Virtual Disk that you are creating.
138 Using PGP Virtual Disk